Add init.d script for vncauthproxy

Add Centos and Ubuntu init scripts as well as documentation
detailing how to install them.
Revert "Add init.d script for vncauthproxy"

This reverts commit 992de9f35930eb95303451dedd82b90d535c7144.
Committed to the wrong branch
Merge branch 'release/0.11.0' of github.com:osuosl/ganeti_webmgr into release/0.11.0
Update changelog, update version